Round Lake (in Little Canada) Lake Status Report
Download 148.26 Kb. Pdf ko'rish
|
|
Round Lake (in Little Canada) Lake Status Report Prepared for Ramsey-Washington Metro Watershed District April 2007 4700 West 77 th Street Minneapolis, MN 55435-4803 Phone: (952) 832-2600 Fax: (952) 832-2601 Barr Engineering Company i
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc Round Lake (in Little Canada) Lake Status Report
1.0 Introduction............................................................................................................................................ 1
2.0 Lake Status Summary ............................................................................................................................ 5 2.1
Round Lake (in Little Canada).................................................................................................... 5
2.1.1
Lake and Watershed Characteristics .............................................................................. 5
2.1.1.1
Description of Round Lake ............................................................................ 5
2.1.1.2
Watershed Characteristics .............................................................................. 5
2.1.1.3
Recreational-Uses........................................................................................... 5
2.1.2
Water Quality Data ...................................................................................................... 13
2.1.2.1
Water Quality Analysis ................................................................................ 13
2.1.2.2
P8 Modeling Results .................................................................................... 13
2.1.3
Recommendations........................................................................................................ 14
2.1.3.1
Water Quality Goals..................................................................................... 14
2.1.3.2
Recreational-Use Level ................................................................................ 14
2.1.3.3
Further Studies ............................................................................................. 14
3.0 Conclusions.......................................................................................................................................... 16 References................................................................................................................................................... 17
Barr Engineering Company ii
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc List of Tables Table 1-1
Summary of RWMWD Recreational-Use Level (2006 Draft Plan), Preliminary RWMWD Water Quality Goals (2006 Draft Plan), Proposed RWMWD Goals (Result of LSR), and Management Class (2006 Draft Plan) as well as 303(d) Impaired Waters and MDNR Ecological Management Class .......................................................................................... 4
Table 2-1 P8 Estimated Watershed Runoff and TP Loads to Round Lake under Wet, Dry, and Average Climatic Conditions .......................................................................................... 13
Table 3-1 Summary of the Proposed RWMWD Recreational-Use Level, Water Quality Goals, and Management Class .......................................................................................................... 16
List of Figures Figure 1-1
Location Map.................................................................................................................... 2 Figure 2-1
Round Lake (Little Canada) Approximate Bathymetry ..................................................... 7 Figure 2-2
Round Lake (Little Canada) Historic Lake Levels 1934—2006........................................ 8 Figure 2-3
Round Lake in Little Canada (a) and its outlet (b & c) ..................................................... 9 Figure 2-4
Extent of the Critical 100-Year Flood for Round Lake ................................................... 10 Figure 2-5
Round Lake (Little Canada) Watershed Land Use .......................................................... 11 Figure 2-6
Round Lake (Little Canada) Subwatersheds & Drainage ................................................ 12
Barr Engineering Company 1
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc 1.0 Introduction One of the primary goals of the Ramsey-Washington Metro Watershed District (District) is to maintain or improve the quality of surface waters to meet or exceed the water quality necessary to support the District’s designated beneficial uses. In 1997 the District established beneficial use categories based on desired recreational activities for a waterbody; and revisited again with the 2006 update as part of the development of the Ramsey-Washington Metro Watershed District Watershed Management Plan (Plan) (Barr, 1997; Barr, 2006 [draft]),. The recreational-use categories are ranked from Level 1 through Level 5, with Level 1 water bodies having the highest number of recreational uses and best water quality. In order to help achieve desired water quality goals established in Plan, many of the lakes within the District have been studied in Strategic Lake Management Plans (SLMPs). However, for many of the smaller lakes within the District, SLMPs have not yet been completed and District water quality goals have not been re-evaluated. Because of limited lake information and water quality data, the development of a complete SLMP would not be possible for many of these small water bodies. Instead, a Lake Status Report (LSR) will be developed and recommendations will be made to outline future studies for these lakes. The purpose of this LSR is to summarize and evaluate the available information for Round Lake (in Little Canada) which has not been previously studied and to determine appropriate water quality goals based on the current and desired recreational uses, as outlined in the Plan, and through discussion with District staff. The watershed areas tributary to Round Lake has already been modeled as part of the development of the larger Phalen Chain of Lakes SLMP (Barr, 2004 [Draft]). Figure 1-1 shows the location of Round Lake. The Plan (Barr, 2006 [draft]) includes preliminary water quality goals and management classes for each of the District-managed lakes. The water quality goals are defined in terms of total phosphorus (TP), chlorophyll a (Chl a), and Secchi disc (SD). The goals outlined in the Plan will remain preliminary until an SLMP or other similar study, such as this LSR, is completed and appropriate goals are determined. The preliminary goals are consistent with either the Minnesota Pollution Control Agency’s (MPCA) proposed draft criteria for shallow lakes in the North Central Hardwood Forests (CHF) ecoregion (MPCA, 2005), or the goals listed in the 1997 Plan.
% g 120 MAPLEWOOD WHITE BEAR LAKE VADNAIS HEIGHTS LITTLE CANADA ST. PAUL NORTH ST PAUL MAPLEWOOD LANDFALL St Paul Beltline Subwatershed Tanners Lake Subwatershed Battle Creek Subwatershed Beaver Lake Subwatershed ¨ § ¦ 694
¨ § ¦ 494 ¨ § ¦ 694
¨ § ¦ 94 ¡ ¢ 61 ¡ ¢ 61 % g 36 % g 5 % g 120 % g 5 % g 36 ¨ § ¦ 35 ¨ § ¦ 35 ¨ § ¦ 694 Battle Creek Lake Tanners Lake Beaver Lake Lake Phalen Wakefield Lake Casey Lake Lake Gervais Kohlman Lake Willow Lake Twin Lake Round Lake Little Pigs Eye Lake Keller Lake Kohlman Lake Subwatershed Lake Gervais Subwatershed Keller Lake Subwatershed Lake Phalen Subwatershed
! ; N Ba rr Fo ot er : D at e: 7 /1 9/ 20 06 1 2: 08 :2 6 PM
Fi le : I:\ Cl ie nt \R wm wd \O th er Di st ric tL ak es \G IS \M ap s\ Fi gu re s\ Fi gu re 1- 1_ Lo ca tio n_ M ap .m xd U se r:
ja k2 Figure 1-1 Location Map Lake Status Report Ramsey-Washington Metro Watershed District 6,000
0 6,000
Feet Barr Engineering Company 3
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc For lakes, the District management classes are identified as either “Improvement” or “Prevent further degradation.” An “Improvement” class is warranted if the public perceives a need for water quality improvement and there are feasible management options that will accomplish water quality improvement. A “Prevent further degradation” class is assigned when current water quality meets the goals set for the lake. A “Prevent further degradation” class does not, however, imply inaction. Rather, development requirements, fisheries, shoreline, and macrophyte management; as well as additional water quality improvement projects; are pursued for the lake as opportunities and budgets allow. For wetlands, the District has developed management Classes A, B, and C, based on a recent inventory and assessment of wetlands within the District. The wetland classification is based on the estimated quality of the wetland, with management Class A being the highest quality wetlands. Water bodies classified as “Water Quality Pond” are constructed treatment ponds only. Additional classifications of the water bodies based on water quality include the Impaired Waters List under Section 303(d) of the Federal Clean Water Act (CWA). Those water bodies that do not meet the water quality standards established under the CWA are included on this list and future development of total maximum daily loads (TMDL) is required. The Minnesota Department of Natural Resources (MDNR) has developed another ecological management classification system for Minnesota lakes (Schupp, 1992) that is based on parameters such as lake size, depth, chemical fertility, and growing season length. Table 1-1 summarizes the goals and classifications of Round Lake Lake. Note that for District- managed wetlands there are no water quality goals established. Additionally, note that the 2006 Preliminary RWMWD Water Quality Goals are those listed in the Plan (Barr, 2006 [draft]). The 2006 Proposed RWMWD Water Quality Goals are the result of this LSR and evaluation of the information available for the Lake. Barr Engineering Company 4
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc Table 1-1 Summary of RWMWD Recreational-Use Level (2006 Draft Plan), Preliminary RWMWD Water Quality Goals (2006 Draft Plan), Proposed RWMWD Goals (Result of LSR), and Management Class (2006 Draft Plan) as well as 303(d) Impaired Waters and MDNR Ecological Management Class Water Body RWMWD Use Level 2006 Preliminary RWMWD Water Quality Goal 2006 Proposed RWMWD Water Quality Goal RWMWD Management Class 303(d) Impaired Waters Pollutant MDNR Ecological Class Round Lake (Little Canada) 2 45-75 µg/L TP 20-40 µg/L Chla 2-3 ft SD TBD 1 45-75 µg/L TP 20-40 µg/L Chla 2-3 ft SD Improvement N/A N/A ___________________________ 1-
of the lake and determine whether or not the Preliminary District Goals are reasonable for this resource.
Barr Engineering Company 5
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc 2.0 Lake Status Summary 2.1 Round Lake (in Little Canada) 2.1.1 Lake and Watershed Characteristics 2.1.1.1 Description of Round Lake Round Lake is located just south of Little Canada Road in Little Canada (Township 29, Range 22, Section 6) and is a 12-acre District-managed lake. It is also classified as a Protected Public Water in the MDNR Public Waters Inventory (62-9P) and is considered a shallow lake, according to the MPCA’s criteria (MPCA, 2005). The maximum depth of Round Lake is 6.6 feet. Approximate bathymetric contours have been created using lake survey data gathered by the District in 2002 and can be seen in Figure 2-1. There is also historic lake level data available for Round Lake from 1934 to 2006 (as seen in Figure 2-2). The primary outlet is located on the eastside of Round Lake and is a 24-inch RCP with a flared-end section and discharges to Gervais Creek. The outlet can be seen in Figure 2-3. The NWL of Round Lake is 901.1 feet MSL. The 100-year flood elevation was determined to be 904.8 feet MSL during the development of the District Watershed Management Plan (Barr, 1997; Barr, 2006 [draft]). Figure 2-4 shows the extent of the 100-year critical flood.
The Round Lake watershed (including the lake surface area) covers a 214-acre area south of Owasso Boulevard and east of Highway 49 and is part of the larger Lake Gervais watershed. Commercial and low-density residential land uses are the major land uses with the breakdown within the watershed as follows: Agricultural (0.5%), Commercial (27.6%), High-density residential (12.1%), Industrial/office (9.7%), Low-density residential (33.3%), Natural/Park/Open (8.7%), Open water (5.8%), and Wetland (2.3%). See Figure 2-5 for a map of watershed land use. Drainage from the watershed flows generally to the east. There are four storm sewer outfalls into Round Lake (per the District survey, 2002). Figure 2-6 shows the general drainage pattern in the Round Lake watershed. 2.1.1.3 Recreational-Uses Round Lake is surrounded by primarily residential and commercial land uses, and there is no public land or access to the lake. Therefore, the recreational-use is limited to those living around the lake.
Barr Engineering Company 6
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc It currently is classified to have Level 2 recreational-uses according to the District’s classification system. With a Level 2 classification, the major associated uses are canoeing, picnicking, and aesthetic viewing. However, there is question as to whether the lake is actually used for canoeing.
! ; N Ba rr
Fo ot er : D at e: 7 /2 6/ 20 06 1 2: 51 :2 1 PM
Fi le : I:\ Cl ie nt \R wm wd \O th er Di st ric tL ak es \G IS \M ap s\ Fi gu re s\ Fi gu re 3- 6_ Ro un dL C_ Ba th ym et ry .m xd U se r:
ja k2 125 0 125
Feet Figure 2-1 Round Lake (Little Canada) Approximate Bathymetry Lake Status Report Ramsey-Washington Metro Watershed District Legend Depth 0 - 1.5 ft 1.5 - 4.3 ft 4.3 - 6.1 ft 6.1 - 6.6 6.6+ ft
896 898
900 902
904 906
908 910
3/22/1934 3/19/1944 3/17/1954 3/14/1964 3/12/1974 3/9/1984
3/7/1994 3/4/2004
Date L a k e E le v a ti o n ( ft ) Figure 2-2 Round Lake (Little Canada) Historic Lake Levels 1934-2006 P:\23\62\924\2362924\Other_Proj_Info\WaterQuality_LakeLevel\Round Lake LC\RoundLakeLC (62-0009).xls: Figure3-7 1/11/2007 10:50 AM
(a) (b) (c) Figure 2-3 Round Lake in Little Canada (a) and its outlet (b & c) (Photos taken 5/11/2006)
! ; N Ba rr
Fo ot er : D at e: 1 2/ 7/ 20 06 8 :5 2: 06 A M
Fi le : I:\ Cl ie nt \R wm wd \O th er Di st ric tL ak es \G IS \M ap s\ Fi gu re s\ Fi gu re 3- 9_ Ro un dL C_ Cr itic al Fl oo dE le va tio n. m xd U se r: ja
k2 125
0 125
Feet Figure 2-4 Round Lake (Little Canada) Critical Flood Elevation Lake Status Report Ramsey-Washington Metro Watershed District Legend Flood Elevation = 904.8 ft MSL ¨ § ¦ 35 % g 49 Round Lake CD16-11 CD16-10 ! ; N Ba rr Fo ot er : D at e: 7 /2 6/ 20 06 1 2: 56 :0 5 PM
Fi le : I:\ Cl ie nt \R wm wd \O th er Di st ric tL ak es \G IS \M ap s\ Fi gu re s\ Fi gu re 3- 10 _R ou nd _L kL C_ Ex ist
_L U. m xd U se r: ja
k2 Figure 2-5 Round Lake (Little Canada) Watershed Land Use
Lake Status Report Ramsey-Washington Metro Watershed District 750 0
Legend Land Use Natural/Park/Open Developed Parkland X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y X Y Golf Course Agricultural Very Low Density Residential Low Density Residential Medium Density Residential High Density Residential Institutional Institutional - High Imperviousness Airport
Highway Commercial Industrial/Office Other
Open Water Wetland
Round Lake Subwatersheds RWMWD Boundary Barr Engineering Company 13
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc 2.1.2 Water Quality Data 2.1.2.1 Water Quality Analysis There is no water quality data for Round Lake with the exception of single Secchi disc measurements from the summers of 1995 and 1996. Therefore, there was insufficient data to run a trend analysis on the data. The mean Secchi disc transparency based on the two observations from the summers of 1995 and 1996 was 0.6 meters. This resulted in a Carlson TSI, based only on Secchi disc values, of 68. This places Round Lake in the Eutrophic to Hypereutropic state, indicating poor water quality and limited recreational-uses. Visual observations from the same dates as the Secchi disc sampling suggest there was medium to high algae growth in the lake, which are consistent with an eutrophic to hypereutrophic state. No fishery, macroinvertebrate, phytoplankton, or zooplankton surveys have been collected for Round Lake. Additionally, concerns about Round Lake water quality have been expressed by a few shoreline residents as far back as 1995 (District, 2006). 2.1.2.2 P8 Modeling Results The P8 Model of the Round Lake watershed was run for wet, dry, and average climatic conditions. Water and total phosphorus loads to Round Lake were determined for each climatic period. The results of this modeling are summarized in Table 2-1. Table 2-1 P8 Estimated Watershed Runoff and TP Loads to Round Lake under Wet, Dry, and Average Climatic Conditions Climatic Condition (Water Year) Parameter Load Flow ac-ft 294.03 Wet (10/1/01-9/30/02) TP lbs 272.82
Flow ac-ft 310.1
Average (10/1/00-9/30/01) TP lbs
250.83 Flow ac-ft 210.5 Dry (10/1/88-9/30/89) TP lbs 212.59
It is important to note that climatic condition periods were selected based on depths of precipitation over a 17-month period that included the summer before the water year of interest because it is assumed that the water and TP load to the lake during this period affects the following year’s spring TP concentration. During the 12-month period from October through September (the water year), however, the water load to the lake was slightly higher during the average year than the wet year. Barr Engineering Company 14
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc Conversely, the TP load was higher in the wet year than in the average year over this 12-month period due to the fact that higher TP loading is often associated with the smaller, more frequent storm events like the ones that occurred between October 2001 and September 2002.
Preliminary District water quality goals for TP, Chl a, and SD are listed in the updated 2006 draft Plan. These goals are the same as those listed in the 1997 Plan, and the District management class is listed as “Improvement.” Round Lake is not listed on the CWA 303(d) Impaired Waters List and it has no MDNR ecological class assigned. See Table 1-1 for a summary of applicable classifications and preliminary goals established for Round Lake. The Minnesota Lake Eutrophication Analysis Procedure (MINLEAP) is a screening tool for estimating lake conditions and for identifying “problem” lakes. In addition, MINLEAP modeling has been done in the past to identify Minnesota Lakes which may be better or worse than they “should be” based on their location, watershed area and lake basin morphometry. Results from MINLEAP suggest that the expected water quality in a minimally impacted lake, similar to Round Lake (based on its location within the Central Hardwood Forest ecoregion and with its basic basin and watershed characteristics), would be within the following ranges for TP, Chl a, and SD; respectively: 55 to 98 μg/L, 17 to 58 μg/L, and 0.6 to 1.3 meters. When comparing these ranges to the 2006 Preliminary water quality goals established by the District, it appears that the water quality goals are on the low end of the expected ranges predicted by MINLEAP.
Although currently classified as a Level 2 lake, its recreational uses are limited to residents living around the lake, as there is no public access. It is questionable that Round Lake is used for canoeing due to its limited access. It is recommended that the District recreational use category be changed to a Level 3 or Level 4 classification with the desired recreational uses being predominantly aesthetic and wildlife viewing. 2.1.3.3 Further Studies If the District identifies water quality in Round Lake as a high priority, the first recommendation would be to collect additional lake information, including concurrent water quality, macrophyte, and fishery data, as there is currently not sufficient data for Round Lake to establish the baseline water Barr Engineering Company 15
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc quality for the lake. Only after understanding the lake’s existing water quality can reasonable goals and direct management options be established for the lake.
Barr Engineering Company 16
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc 3.0 Conclusions In summary, for Round Lake there is little information available with regards to water quality, macrophytes, and fisheries. Because of limited information, updated District water quality management goals cannot be established. Table 3-1 below summarizes the proposed District recreational-use levels, water quality goals, and management classes based on evaluation of the data available for Round Lake. Table 3-1 Summary of the Proposed RWMWD Recreational-Use Level, Water Quality Goals, and Management Class Water Body RWMWD Use Level 2006 RWMWD Water Quality Goal RWMWD Management Class Round Lake (Little Canada) 3-4 TBD
1 45-75 µg/L TP 20-40 µ g/L Chla 2-3 ft SD Improvement _______________ 1-
of the lake and determine whether or not the Preliminary District Goals are reasonable for this resource. Barr Engineering Company 17
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc References Barr Engineering Co. 1975. Hydrologic Analysis of Lakes and Open Space in Ramsey County. Barr Engineering Co. November 1988. Phalen Chain of Lakes Surface Water Management Plan. Ramsey-Washington Metro Watershed District. Barr Engineering Co. 1997. Ramsey-Washington Metro Watershed District Watershed Management
Barr Engineering Co. 1990. An Evaluation of District Water Quality Data Collected from 1977 through 1989. Ramsey-Washington Metro Watershed District. Barr Engineering Co. November 1993. Twin Lake Hydrologic Study. Ramsey-Washington Metro Watershed District. Barr Engineering Co. September 2004. Beltline Interceptor XP-SWMM Modeling Update. Ramsey- Washington Metro Watershed District. Barr Engineering Co. October 2004. Beltline Interceptor P8 Modeling. Ramsey-Washington Metro Watershed District. Barr Engineering Co. October 2004. Draft Phalen Chain of Lakes Strategic Lake Management Plan. Ramsey-Washington Metro Watershed District. Barr Engineering Co. July 2005. Draft Kohlman and Keller Lakes Total Maximum Daily Load Report. Ramsey-Washington Metro Watershed District. Barr Engineering Co. July 2005. Beltline Subwatershed CIP Feasibility Study (DRAFT). Ramsey- Washington Metro Watershed District. Barr Engineering Co. December 2005. Phalen Chain of Lakes Summary Report and Final Lake Management Recommendations. Ramsey-Washington Metro Watershed District. Barr Engineering Co. October 2005. Internal Phosphorus Load Study: Kohlman and Keller Lakes. Ramsey-Washington Metro Watershed District. Barr Engineering Co. 2006. Draft Ramsey-Washington Metro Watershed District Watershed Management Plan. Updated from 1997 version. Carlson, R.E. 1977. A Trophic State Index for Lakes. Limnology and Oceanography 22 (2): 361-369. Climatology Working Group Website. http://climate.umn.edu , and
http://climate.umn.edu/doc/twin_cities/twin_cities.htm
Cowardin, Lewis M. 1979. Classification of Wetlands and Deepwater Habitats of the United States, FWS/OBS-79/31, U.S. Fish and Wildlife Service, U.S. Department of Interior. Barr Engineering Company 18
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc Heiskary and Wilson. 1990. Minnesota Lake Water Quality Assessment Report—Second Edition—A
IEP Inc. 1990. Program for Predicting Polluting Particle Passage through Pits, Puddles and Ponds (P8). Metropolitan Council. 2003. Stream Monitoring Report. http://www.metrocouncil.org/environment/RiversLakes/Streams/ Reports/2003_Report/ Midwestern Regional Climate Center website http://mcc.sws.uiuc.edu/climate_midwest/mwclimate_data_summaries.htm#
Minnesota Department of Natural Resources. Lake Finder Website. www.dnr.state.mn.us/lakefind/index.html.
Minnesota Department of Natural Resources. 1994. Minnesota County Biological Survey Natural Community and Rare Species County Maps – Ramsey and Anoka Counties. Minnesota Department of Natural Resources. Climate website. http://www.dnr.state.mn.us/climate/index.html Minnesota Geologic Survey. 1992. Geologic Atlas Ramsey County, Minnesota. County Atlas Series Atlas C-7. Minnesota Pollution Control Agency. Website. www.pca.state.mn.us. Minnesota Pollution Control Agency. Citizen Lake Monitoring Program. www.pca.state.mn.us
Minnesota Pollution Control Agency (MPCA). 2004. Statewide Mercury TMDL Plan Factsheet. Minnesota Pollution Control Agency. September 2005. Minnesota Lake Water Quality Assessment Report: Developing Nutrient Criteria, Third Edition. Minnesota Pollution Control Agency. October 2005. Guidance Manual for Assessing the Quality of Minnesota Surface Waters for the Determination of Impairment, 305(b) report and 303(d) List. Ramsey County Department of Public Works. March 1985. Report to RWMWD on the Water Quality of Beaver and Wakefield Lakes. Ramsey County Department of Public Works. June 1986. Report to RWMWD on the Water Quality of Beaver and Wakefield Lakes. Ramsey-Washington Metro Watershed District. 1997. Ramsey-Washington Metro Watershed District Watershed Management Plan. Ramsey-Washington Metro Watershed District. June 1999. Greenways and Natural Areas Report & Vegetative Cover Inventory. Schupp, D. 1992. An Ecological Classification of Minnesota Lakes with Associated Fish Communities. Minnesota Department of Natural Resources. Investigational Report 417. Barr Engineering Company 19
P:\Mpls\23 MN\62\2362924\_MovedFromMpls_P\2362924\Other_Proj_Info\Report_Info\Individual_LSRs_11107\RoundLC\RoundLC_Lake_Status_Report.doc Seeley, Mark W. 2006. Minnesota Weather Almanac, Minnesota Historical Society Press, St. Paul, MN.
SEH. 1989. Surface Water Management Plan for the City of Vadnais Heights. Soil Conservation Service (SCS). 1977. Soil Survey of Ramsey and Washington Counties. State of Minnesota Storm-Water Advisory Group. June 1997. Storm-Water and Wetlands: Planning and Evaluation Guidelines for Addressing Potential Impacts of Urban Storm-Water and Snow- Melt Runoff on Wetlands. Download 148.26 Kb. Do'stlaringiz bilan baham: 
|